Really desperate for advice on getting coronavirus vaccine at home

I suffer from severe agoraphobia and the only place I can venture is to my GP in my friends car only as it is familiar. I suffer from a range of mental health disorders Severe PTSD to the state I hallucinate sometimes revisiting scenes and and hurtful places and experiences.
I require the covid jab and have not been able to due to my friends car not being available. My GP surgery has always been helpful and aware any support or therapy has always been in the home.

It has recently been took over by a new GP who refused me a home visit for covid jab.
My friend has 2 children with autism and covid have changed everyone's situation.
Her sister is staying with her for 3 weeks so its opened a window with her being able to take me to GP surgery and escort me.

The HCA and head receptionist of practice has explained how severe my situation is and explained this to NEW head GP. Also I have been in contact with practice lately and referred to crisis team as I have a history of suicide and self harm. Had a lot of dark thoughts lately. I am also severe asthmatic. I have lost 2 stone in weight.

Any advice I seek is contact my gp. My 2 friends who care for me have vulnerabilities themselves and this may impact if i need support services in home and am not vacinated

My GP surgery is not doing covid jab any more only boosters.  Please someone advise me what i can do